---
title: WorksheetFunction.Acosh Method (Excel)
keywords: vbaxl10.chm137168
f1_keywords:
- vbaxl10.chm137168
ms.prod: excel
api_name:
- Excel.WorksheetFunction.Acosh
ms.assetid: 919150e6-cab9-5470-f68d-fd69a4abf388
ms.date: 06/08/2017
---


# WorksheetFunction.Acosh Method (Excel)

Returns the inverse hyperbolic cosine of a number. Number must be greater than or equal to 1. The inverse hyperbolic cosine is the value whose hyperbolic cosine is  _Arg1_, so Acosh(Cosh(number)) equals  _Arg1_.


## Syntax

 _expression_ . **Acosh**( **_Arg1_** )

 _expression_ A variable that represents a **WorksheetFunction** object.


### Parameters



|**Name**|**Required/Optional**|**Data Type**|**Description**|
|:-----|:-----|:-----|:-----|
| _Arg1_|Required| **Double**|Any real number equal to or greater than 1.|

### Return Value

Double


## See also


#### Concepts


[WorksheetFunction Object](worksheetfunction-object-excel.md)

